page_title: Closteroviridae
section_title: Taxonomy
hierarchical_section_title: Closteroviridae / Taxonomy
caption_attribution_description: English: Schematic diagrams of the genome structure of the representative viruses in the four genera of the family Closteroviridae. LIYV, Lettuce infectious yellows virus, genus Crinivirus; BYV, Beet yellows virus, genus Closterovirus; GLRaV-3, Grapevine leafroll-associated virus 3, genus Ampelovirus; GLRaV-7, Grapevine leafroll-associated virus 7, genus Velarivirus. ORFs are shown as boxes, with the related domains indicated in the same in-fill. PRO, papain-like cysteine proteinase; MTR, methyltransferase; HEL, helicase; POL, RNA-dependent RNA polymerase; HSP70h, heat shock protein 70 homolog; CP, capsid protein; CPm, minor capsid protein; P, proteins named by their approximate molecular mass (e.g., P34, 34-kDa protein). The functional roles of some of the protein products are indicated with the well-studied LIYV and BYV. Genome size is labeled on the right side.
context_page_description: Closteroviridae is a family of viruses. Plants serve as natural hosts. There are currently 56 species in this family, divided among 4 genera, seven species of which are unassigned. Diseases associated with this family include: yellowing and necrosis, particularly affecting the phloem.
context_section_description: Genome type and transmission vector are two of the most important traits used for classification. Ampeloviruses and Closteroviruses have monopartite genomes and are transmitted by pseudococcid mealybugs (and soft scale insects) and aphids respectively. While  Criniviruses are bipartite and transmitted by whiteflies.
  Genera:
  Ampelovirus
  Closterovirus
  Crinivirus
  Velarivirus
  Unassigned species:
  Actinidia virus 1
  Alligatorweed stunting virus
  Blueberry virus A
  Megakespama mosaic virus
  Mint vein banding-associated virus
  Olive leaf yellowing-associated virus
  Persimmon virus B
caption: Schematic diagrams of the genome structure of the representative viruses in the four genera of the family Closteroviridae.
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